linux-kernel - Re: [2.6 patch] mark virt_to_bus/bus_to_virt as _

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Date:	Tue, 3 Oct 2006 07:07:48 +0200
From:	Adrian Bunk <bunk@...sta.de>
To:	Andrew Morton <akpm@...l.org>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Judith Lebzelter <judith@...l.org>, linuxppc-dev@...abs.org,
	Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [2.6 patch] mark virt_to_bus/bus_to_virt as __deprecated on i386

On Mon, Oct 02, 2006 at 09:55:27PM -0700, Andrew Morton wrote:
> On Tue, 03 Oct 2006 14:49:39 +1000
> Benjamin Herrenschmidt <benh@...nel.crashing.org> wrote:
> 
> > On Mon, 2006-10-02 at 21:44 -0700, Andrew Morton wrote:
> > > On Tue, 03 Oct 2006 14:37:25 +1000
> > > Benjamin Herrenschmidt <benh@...nel.crashing.org> wrote:
> > > 
> > > > > > You might want to convince Andrew accepting my patch to make 
> > > > > > virt_to_bus/bus_to_virt give compile warnings on i386 for making
> > > > > > people more aware of this problem...
> > > > > >...
> > > > 
> > > > Andrew, is there any reason not to take that patch ?
> > > 
> > > It generates lots of warnings from drivers which nobody does any work on.
> > > 
> > > Net result: lots of new warnings, no fixed bugs.
> > 
> > Are you sure the warnings won't cause somebody like Al to go through
> > them all and fix them ?
> 
> The drivers simply don't link on some architectures, due to missing
> virt_to_bus/bus_to_virt.    They aren't hard to find.
>...

As my patch description says, there had even been one bus_to_virt() 
accidentally added in 2.6.17-rc1.

Shouldn't people become aware of it as early and as often as possible?

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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